中国物理B ›› 2016, Vol. 25 ›› Issue (12): 124208-124208.doi: 10.1088/1674-1056/25/12/124208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Modulation instabilities in randomly birefringent two-mode optical fibers

Jin-Hua Li(李金花), Hai-Dong Ren(任海东), Shi-Xin Pei(裴世鑫), Zhao-Lou Cao(曹兆楼), Feng-Lin Xian(咸冯林)   

  1. 1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology(NUIST), Nanjing 210044, China;
    2. Sunnypol Optoelectronics Company Limited, Hefei 231135, China
  • 收稿日期:2016-08-02 修回日期:2016-09-17 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: Jin-Hua Li, Feng-Lin Xian E-mail:lijinhua@nuist.edu.cn;002642@nuist.edu.cn
  • 基金资助:

    Project supported by the Natural Science Foundation of Jiangsu Provincial Universities (Grant No. 14KJB140009), the National Natural Science Foundation of China (Grant No. 11447113), and the Startup Foundation for Introducing Talent of NUIST (Grant No. 2241131301064).

Modulation instabilities in randomly birefringent two-mode optical fibers

Jin-Hua Li(李金花)1, Hai-Dong Ren(任海东)2, Shi-Xin Pei(裴世鑫)1, Zhao-Lou Cao(曹兆楼)1, Feng-Lin Xian(咸冯林)1   

  1. 1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology(NUIST), Nanjing 210044, China;
    2. Sunnypol Optoelectronics Company Limited, Hefei 231135, China
  • Received:2016-08-02 Revised:2016-09-17 Online:2016-12-05 Published:2016-12-05
  • Contact: Jin-Hua Li, Feng-Lin Xian E-mail:lijinhua@nuist.edu.cn;002642@nuist.edu.cn
  • Supported by:

    Project supported by the Natural Science Foundation of Jiangsu Provincial Universities (Grant No. 14KJB140009), the National Natural Science Foundation of China (Grant No. 11447113), and the Startup Foundation for Introducing Talent of NUIST (Grant No. 2241131301064).

摘要:

Modulation instabilities in the randomly birefringent two-mode optical fibers (RB-TMFs) are analyzed in detail by accounting the effects of the differential mode group delay (DMGD) and group velocity dispersion (GVD) ratio between the two modes, both of which are absent in the randomly birefringent single-mode optical fibers (RB-SMFs). New MI characteristics are found in both normal and anomalous dispersion regimes. For the normal dispersion, without DMGD, no MI exists. With DMGD, a completely new MI band is generated as long as the total power is smaller than a critical total power value, named by Pcr, which increases significantly with the increment of DMGD, and reduces dramatically as GVD ratio and power ratio between the two modes increases. For the anomalous dispersion, there is one MI band without DMGD. In the presence of DMGD, the MI gain is reduced generally. On the other hand, there also exists a critical total power (Pcr), which increases (decreases) distinctly with the increment of DMGD (GVD ratio of the two modes) but varies complicatedly with the power ratio between the two modes. Two MI bands are present for total power smaller than Pcr, and the dominant band can be switched between the low and high frequency bands by adjusting the power ratio between the two modes. The MI analysis in this paper is verified by numerical simulation.

关键词: modulation instability, Manakov equations, two-mode optical fibers, random birefringence

Abstract:

Modulation instabilities in the randomly birefringent two-mode optical fibers (RB-TMFs) are analyzed in detail by accounting the effects of the differential mode group delay (DMGD) and group velocity dispersion (GVD) ratio between the two modes, both of which are absent in the randomly birefringent single-mode optical fibers (RB-SMFs). New MI characteristics are found in both normal and anomalous dispersion regimes. For the normal dispersion, without DMGD, no MI exists. With DMGD, a completely new MI band is generated as long as the total power is smaller than a critical total power value, named by Pcr, which increases significantly with the increment of DMGD, and reduces dramatically as GVD ratio and power ratio between the two modes increases. For the anomalous dispersion, there is one MI band without DMGD. In the presence of DMGD, the MI gain is reduced generally. On the other hand, there also exists a critical total power (Pcr), which increases (decreases) distinctly with the increment of DMGD (GVD ratio of the two modes) but varies complicatedly with the power ratio between the two modes. Two MI bands are present for total power smaller than Pcr, and the dominant band can be switched between the low and high frequency bands by adjusting the power ratio between the two modes. The MI analysis in this paper is verified by numerical simulation.

Key words: modulation instability, Manakov equations, two-mode optical fibers, random birefringence

中图分类号:  (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)

  • 42.65.Sf
42.25.Bs (Wave propagation, transmission and absorption) 42.81.Gs (Birefringence, polarization)